vfs: add "readlines" and "tryreadlines" This patch allows "readlines" and "tryreadlines" to take "mode" argument, because "subrepo" requires to read files not in "rb" (binary, default for vfs) but in "r" (text) mode in subsequent patch.

subrepo: add "_cachestorehashvfs" to handle cache store hash files via vfs This "vfs" object will be used by subsequent patches to handle cache store hash files without direct file APIs. This patch decorates "_cachestorehashvfs" with "@propertycache" to delay vfs creation, because it is used only for cooperation with other repositories. In this patch, "/" is used as the path separator, even though "self._repo.join" uses platform specific path separator (e.g. "\\" on Windows). But it is reasonable enough, because "store" and other management file handling already include such implementation, and they work well.

subrepo: remove "_calcfilehash" referred by no other code paths

subrepo: replace "_calcfilehash" invocation by "vfs.tryread" "_calcfilehash" can be completely replaced by simple "vfs.tryread" invocation. def _calcfilehash(filename): data = '' if os.path.exists(filename): fd = open(filename, 'rb') data = fd.read() fd.close() return util.sha1(data).hexdigest() Building absolute path "absname" up by "self._repo.join" for files in "filelist" is avoided, because "vfs.tryread" does so internally.

subrepo: replace "os.path.exists" by "exists" via wvfs of the parent Existance of specified "path" should be examined by "exists" via wvfs of the parent repository, because the working directory of the parent repository may be in UTF-8 mode. Wide API should be used via wvfs in such case. In this patch, "/" is used as the path separator, even though "path" uses platform specific path separator (e.g. "\\" on Windows). But it is reasonable enough, because "store" and other management file handling already include such implementation, and they work well.

subrepo: avoid redundant "util.makedirs" invocation "util.makedirs" for the (sub-)repository root of "hgsubrepo" is also executed in the constructor of "localrepository", if "create" is True and ".hg" of it doesn't exist. This patch avoids redundant "util.makedirs" invocation in the constructor of "hgsubrepo".

merge: remove confusing comment about --force manifestmerge() has a piece of code that's roughly: if not force and different: abort else: # if different: old untracked f may be overwritten and lost ... The comment only talks about what happens when 'different' is true, and in combination with the if-block above, that must mean that it is only about what happens when 'force and different'. It seems quite fine that files are overwritten when 'force' is true, so let's remove the comment. As it stands, it can easily be interpreted as a TODO (which is how I interpreted it at first).

phases: read pending data when appropriate If we are called by a hook and pending data exists, read those.

bookmark: read pending data when appropriate If we are called by a hook and pending data exists, read it.

test-bundle2: check visible data in pre/post-transaction hooks We are about to make bookmarks and phases available for hooks. Therefore we need a witness for this new availability. We introduce the new hooks in a distinct changeset to reduce the noise in the ones with actual changes.